2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 /**************************************************************************
29 * Support for persistent environment data
31 * The "environment" is stored as a list of '\0' terminated
32 * "name=value" strings. The end of the list is marked by a double
33 * '\0'. New entries are always added at the end. Deleting an entry
34 * shifts the remaining entries to the front. Replacing an entry is a
35 * combination of deleting the old value and adding the new one.
37 * The environment is preceeded by a 32 bit CRC over the data part.
39 **************************************************************************
44 #include <environment.h>
47 #include <linux/stddef.h>
48 #include <asm/byteorder.h>
49 #if defined(CONFIG_CMD_NET)
53 DECLARE_GLOBAL_DATA_PTR;
55 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
56 !defined(CONFIG_ENV_IS_IN_FLASH) && \
57 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
58 !defined(CONFIG_ENV_IS_IN_MG_DISK) && \
59 !defined(CONFIG_ENV_IS_IN_NAND) && \
60 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
61 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
62 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
63 !defined(CONFIG_ENV_IS_NOWHERE)
64 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
65 SPI_FLASH|MG_DISK|NVRAM|NOWHERE}
69 #define MK_STR(x) XMK_STR(x)
71 /************************************************************************
72 ************************************************************************/
75 * Table with supported baudrates (defined in config_xyz.h)
77 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
78 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
80 static int env_id = 1;
86 /************************************************************************
87 * Command interface: print one or all environment variables
90 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
95 if (argc == 1) { /* Print all env variables */
96 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
97 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
100 putc(env_get_char(k));
104 puts ("\n ** Abort\n");
109 printf("\nEnvironment size: %d/%ld bytes\n",
115 for (i=1; i<argc; ++i) { /* print single env variables */
116 char *name = argv[i];
120 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
122 for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
124 k = envmatch((uchar *)name, j);
131 putc(env_get_char(k++));
136 printf ("## Error: \"%s\" not defined\n", name);
143 /************************************************************************
144 * Set a new environment variable,
145 * or replace or delete an existing one.
147 * This function will ONLY work with a in-RAM copy of the environment
150 int _do_setenv (int flag, int argc, char *argv[])
154 uchar *env, *nxt = NULL;
158 uchar *env_data = env_get_addr(0);
160 if (!env_data) /* need copy in RAM */
165 if (strchr(name, '=')) {
166 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
172 * search if variable with this name already exists
175 for (env=env_data; *env; env=nxt+1) {
176 for (nxt=env; *nxt; ++nxt)
178 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
183 * Delete any existing definition
186 #ifndef CONFIG_ENV_OVERWRITE
189 * Ethernet Address and serial# can be set only once,
193 #ifdef CONFIG_HAS_UID
194 /* Allow serial# forced overwrite with 0xdeaf4add flag */
195 ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
197 (strcmp (name, "serial#") == 0) ||
199 ((strcmp (name, "ethaddr") == 0)
200 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
201 && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
202 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
204 printf ("Can't overwrite \"%s\"\n", name);
209 /* Check for console redirection */
210 if (strcmp(name,"stdin") == 0) {
212 } else if (strcmp(name,"stdout") == 0) {
214 } else if (strcmp(name,"stderr") == 0) {
219 if (argc < 3) { /* Cannot delete it! */
220 printf("Can't delete \"%s\"\n", name);
224 #ifdef CONFIG_CONSOLE_MUX
225 i = iomux_doenv(console, argv[2]);
229 /* Try assigning specified device */
230 if (console_assign (console, argv[2]) < 0)
233 #ifdef CONFIG_SERIAL_MULTI
234 if (serial_assign (argv[2]) < 0)
237 #endif /* CONFIG_CONSOLE_MUX */
241 * Switch to new baudrate if new baudrate is supported
243 if (strcmp(argv[1],"baudrate") == 0) {
244 int baudrate = simple_strtoul(argv[2], NULL, 10);
246 for (i=0; i<N_BAUDRATES; ++i) {
247 if (baudrate == baudrate_table[i])
250 if (i == N_BAUDRATES) {
251 printf ("## Baudrate %d bps not supported\n",
255 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
258 gd->baudrate = baudrate;
259 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
260 gd->bd->bi_baudrate = baudrate;
271 if (*++nxt == '\0') {
272 if (env > env_data) {
280 if ((*env == '\0') && (*nxt == '\0'))
289 if ((argc < 3) || argv[2] == NULL) {
295 * Append new definition at the end
297 for (env=env_data; *env || *(env+1); ++env)
303 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
305 len = strlen(name) + 2;
306 /* add '=' for first arg, ' ' for all others */
307 for (i=2; i<argc; ++i) {
308 len += strlen(argv[i]) + 1;
310 if (len > (&env_data[ENV_SIZE]-env)) {
311 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
314 while ((*env = *name++) != '\0')
316 for (i=2; i<argc; ++i) {
319 *env = (i==2) ? '=' : ' ';
320 while ((*++env = *val++) != '\0')
324 /* end is marked with double '\0' */
331 * Some variables should be updated when the corresponding
332 * entry in the enviornment is changed
335 if (strcmp(argv[1],"ethaddr") == 0)
338 if (strcmp(argv[1],"ipaddr") == 0) {
339 char *s = argv[2]; /* always use only one arg */
343 for (addr=0, i=0; i<4; ++i) {
344 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
346 addr |= (val & 0xFF);
347 if (s) s = (*e) ? e+1 : e;
349 bd->bi_ip_addr = htonl(addr);
352 if (strcmp(argv[1],"loadaddr") == 0) {
353 load_addr = simple_strtoul(argv[2], NULL, 16);
356 #if defined(CONFIG_CMD_NET)
357 if (strcmp(argv[1],"bootfile") == 0) {
358 copy_filename (BootFile, argv[2], sizeof(BootFile));
363 #ifdef CONFIG_AMIGAONEG3SE
364 if (strcmp(argv[1], "vga_fg_color") == 0 ||
365 strcmp(argv[1], "vga_bg_color") == 0 ) {
366 extern void video_set_color(unsigned char attr);
367 extern unsigned char video_get_attr(void);
369 video_set_color(video_get_attr());
372 #endif /* CONFIG_AMIGAONEG3SE */
377 int setenv (char *varname, char *varvalue)
379 char *argv[4] = { "setenv", varname, varvalue, NULL };
380 if (varvalue == NULL)
381 return _do_setenv (0, 2, argv);
383 return _do_setenv (0, 3, argv);
386 #ifdef CONFIG_HAS_UID
387 void forceenv (char *varname, char *varvalue)
389 char *argv[4] = { "forceenv", varname, varvalue, NULL };
390 _do_setenv (0xdeaf4add, 3, argv);
394 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
401 return _do_setenv (flag, argc, argv);
404 /************************************************************************
405 * Prompt for environment variable
408 #if defined(CONFIG_CMD_ASKENV)
409 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
411 extern char console_buffer[CONFIG_SYS_CBSIZE];
412 char message[CONFIG_SYS_CBSIZE];
413 int size = CONFIG_SYS_CBSIZE - 1;
417 local_args[0] = argv[0];
418 local_args[1] = argv[1];
419 local_args[2] = NULL;
420 local_args[3] = NULL;
426 /* Check the syntax */
432 case 2: /* askenv envname */
433 sprintf (message, "Please enter '%s':", argv[1]);
436 case 3: /* askenv envname size */
437 sprintf (message, "Please enter '%s':", argv[1]);
438 size = simple_strtoul (argv[2], NULL, 10);
441 default: /* askenv envname message1 ... messagen size */
446 for (i = 2; i < argc - 1; i++) {
448 message[pos++] = ' ';
450 strcpy (message+pos, argv[i]);
451 pos += strlen(argv[i]);
454 size = simple_strtoul (argv[argc - 1], NULL, 10);
459 if (size >= CONFIG_SYS_CBSIZE)
460 size = CONFIG_SYS_CBSIZE - 1;
465 /* prompt for input */
466 len = readline (message);
469 console_buffer[size] = '\0';
472 if (console_buffer[0] != '\0') {
473 local_args[2] = console_buffer;
477 /* Continue calling setenv code */
478 return _do_setenv (flag, len, local_args);
482 /************************************************************************
483 * Look up variable from environment,
484 * return address of storage for that variable,
485 * or NULL if not found
488 char *getenv (char *name)
494 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
497 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
498 if (nxt >= CONFIG_ENV_SIZE) {
502 if ((val=envmatch((uchar *)name, i)) < 0)
504 return ((char *)env_get_addr(val));
510 int getenv_r (char *name, char *buf, unsigned len)
514 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
517 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
518 if (nxt >= CONFIG_ENV_SIZE) {
522 if ((val=envmatch((uchar *)name, i)) < 0)
524 /* found; copy out */
526 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
535 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
537 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
539 extern char * env_name_spec;
541 printf ("Saving Environment to %s...\n", env_name_spec);
543 return (saveenv() ? 1 : 0);
547 saveenv, 1, 0, do_saveenv,
548 "save environment variables to persistent storage",
555 /************************************************************************
556 * Match a name / name=value pair
558 * s1 is either a simple 'name', or a 'name=value' pair.
559 * i2 is the environment index for a 'name2=value2' pair.
560 * If the names match, return the index for the value2, else NULL.
563 int envmatch (uchar *s1, int i2)
566 while (*s1 == env_get_char(i2++))
569 if (*s1 == '\0' && env_get_char(i2-1) == '=')
575 /**************************************************/
578 printenv, CONFIG_SYS_MAXARGS, 1, do_printenv,
579 "print environment variables",
580 "\n - print values of all environment variables\n"
581 "printenv name ...\n"
582 " - print value of environment variable 'name'\n"
586 setenv, CONFIG_SYS_MAXARGS, 0, do_setenv,
587 "set environment variables",
589 " - set environment variable 'name' to 'value ...'\n"
591 " - delete environment variable 'name'\n"
594 #if defined(CONFIG_CMD_ASKENV)
597 askenv, CONFIG_SYS_MAXARGS, 1, do_askenv,
598 "get environment variables from stdin",
599 "name [message] [size]\n"
600 " - get environment variable 'name' from stdin (max 'size' chars)\n"
602 " - get environment variable 'name' from stdin\n"
604 " - get environment variable 'name' from stdin (max 'size' chars)\n"
605 "askenv name [message] size\n"
606 " - display 'message' string and get environment variable 'name'"
607 "from stdin (max 'size' chars)\n"
611 #if defined(CONFIG_CMD_RUN)
612 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
614 run, CONFIG_SYS_MAXARGS, 1, do_run,
615 "run commands in an environment variable",
617 " - run the commands in the environment variable(s) 'var'\n"